In This Question, Assume That the Life Cycle of a Flowering

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit. Two events that occur in the life cycle are the division of a microspore nucleus and the formation of sculptured wall.

A) The division of a microspore nucleus precedes the formation of sculptured wall.
B) The formation of a sculptured wall precedes the division of a microspore nucleus.
C) Both events occur more or less simultaneously.